Grade 9 Electricity Practice Exam

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Which statement best describes direct current?

Flow of electrons in one direction.

Direct current means electric charges move in a single, fixed direction. A DC source like a battery maintains a constant polarity, pushing electrons steadily from the negative terminal toward the positive, so the current direction stays the same. The other ideas describe alternating current or an open circuit, which aren’t DC.

Flow of electrons in alternating directions.

No electron flow.

Flow direction changes.

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